I can't cite the exact source off hand, but I am very sure that adding TEI encoding is
regarded as "contains sufficient originality", and that this has been agreed in legal
context in at least one jurisdiction. I would no hesitation, were I you, in licensing
your work in good faith as copyright owner.
remember that you need to check age of death + 70 to be sure a work
is out of copyright. so if you're not sure the author died before 1942,
be careful. James Joyce is OK, Olaf Stapledon is not.
don't bother with Hamlet, though, its been done :-}
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